noun 1. skybridge (def 1).
adverb 1. Also, skywards. toward the sky. adjective 2. directed toward the sky. adjective 1. directed or moving towards the sky adverb 2. Also skywards. towards the sky
noun, Radio. 1. a radio wave propagated upward from earth, whether reflected by the ionosphere or not. noun 1. a radio wave reflected back to the earth by the ionosphere (ionospheric wave), permitting transmission around the curved surface of the earth Compare ground wave
noun 1. air lane. 2. an elevated highway, especially one well above ground level and composed of a series of spans.